Andrew Morton wrote:

On Wed, 04 Apr 2007 12:12:09 -0700 Jeremy Fitzhardinge [off-list ref] wrote:

  

quoted

Three cleanups:
 - change "instable" -> "unstable"
 - its better to use get_cpu_var for getting this cpu's variables
 - change cycles_2_ns to do the full computation rather than just the
   tsc->ns scaling.  Its a simpler interface, and it makes the function
   more generally useful.

Signed-off-by: Jeremy Fitzhardinge <redacted>

---
 arch/i386/kernel/sched-clock.c |   35 +++++++++++++++++++++--------------
    

I'm dropping the relevant patch from Andi's tree due to it causing
mysterious hangs when initscripts start ondemand.  So I'll need to drop
this patch and "[patch 19/20] Add a sched_clock paravirt_op".
  

OK.  That just means we need to go back to the original "Add a
sched_clock paravirt_op" follow-on patch.

I still need to work out why that hang is happening - it is very
mysterious.  I got as far as working out that it was hanging on
write_seqlock_irqsave(xtime_lock), then remembered that it's with
CONFIG_SMP=n so I stomped off to bed in disgust.  Later.
  

Hangs always, or just sometimes?  I haven't seen any problems with it.

    J